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2 years ago

If 4x^2 - 100 = 0, what are the roots of the equation?

Mathematics

2 answers:

drek231 [11]2 years ago

8 0

The roots to this equation i s either positive or negative five

BartSMP [9]2 years ago

4 0

Positive or negative 5

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Which is part interphase

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2 years ago

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By which angle measures can the square be rotated so it maps onto itself?

Amanda [17]

The <em><u>correct answers</u></em> are:

90°, 180° and 270°

Explanation:

Squares have rotational symmetry at 90°. This can be found by dividing the number of degrees in a circle, 360, by the number of sides, 4:

360/4 = 90

This means that at all multiples of 90, the square will rotate onto itself. This means that 90, 180 and 270 are all correct.

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2 years ago

There will be 7 people at a party.If each person will eat 5/8 of a pound of chicken, how many pounds of chicken are needed?

vagabundo [1.1K]

Answer:

4 $\frac{3}{8}$ pounds of chicken

Step-by-step explanation:

To make the 7 a fraction we put a one under it. Then we multiple the tops of the two fractions together and the bottom two numbers of the fraction together:

$\frac{7}{1} X \frac{5}{8}$ = $\frac{35}{8}$

Finally, we simplify the improper fraction into a mixed number:

4 $\frac{3}{8}$

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2 years ago

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If 4\5 x ⬛ =2\5 then what is ⬛

Naya [18.7K]

[box] equals 1/2 (i think; check by dividing 0.8 by 0.4 on calculator, or 4/5 divided by 2/5 on fraction calculator... kind of obvious)

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2 years ago

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Marcus and Lara each have the same number of songs on their ipods. Marcus has 10x + 8 songs and Lara has

devlian [24]

Answer:

The value of x is 20.

Step-by-step explanation:

Given that

Number of songs Marcus has = 10x+8

Number of songs Lara has = 15x-92

It is also given that they have the same number of songs that means both the expressions should be equal.

Putting both equal

$10x+8 = 15x-92$

This is a linear equation in one variable which can be solved using properties of equality

Subtracting 10 from both sides

$10x+8-10x = 15x-92-10x\\8 = 5x-92$

Adding 92 on both sides

$8+92 = 5x-92+92\\100 = 5x$

Dividing both sides by 5

$\frac{5x}{5} = \frac{100}{5}\\x = 20$

Hence,

The value of x is 20.

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2 years ago